[PGSigns]

Here is a way to get the pinion angle set. Bolt the rear in the truck with out the springs or shocks hooked up. Ensure it is centered with the trailing arms. Raise the rear end up to the desired ride height and set it on jack stands. Then match the angle of the rear to the angle of the trans or the front drive shaft depending on one or two piece drive shaft. Tighten the ubolts till they are firmly holding the rear and recheck your angles. Tack weld the perches and remove the rear end. Stitch weld the perches to reduce how much heat you put into the housing so that you done pull the ends out of alignment.
Jimmy